change-of-pace vs off-speed pitch

change-of-pace and off-speed pitch both are nouns.

Word	Noun	Adjective	Verb	Adverb
change-of-pace	Yes	No	No	No
off-speed pitch	Yes	No	No	No

As nouns, change-of-pace and off-speed pitch are synonyms defined as:

change-of-pace and off-speed pitch: a baseball thrown with little velocity when the batter is expecting a fastball

Other synonyms of change-of-pace include change-of-pace ball, change-up.

change-of-pace (noun)	off-speed pitch (noun)
a baseball thrown with little velocity when the batter is expecting a fastball	a baseball thrown with little velocity when the batter is expecting a fastball